Hydraulic running and release tool with mechanical emergency release
CA 2028723 C · Owner: Baker, Samuel Fred · Inventors: Baker, Samuel Fred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic running and release tool includes a mandrel, outer sleeve, latch nut and piston which may be hydraulically or mechanically actuated to release the tool from a tubular member after it has been positioned in a well bore. The latch nut and piston are releasably connected together by a shear member between the outer sleeve and the mandrel and the latch nut is releasably connected to a tubular member, with the piston positioned adjacent the releasable connection between the latch nut and tubular member to prevent premature disconnection of the latch nut from the tubular member. To release the hydraulic tool, fluid pressure through a port in the mandrel from the well string acts on …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 29, 1990 and granted April 28, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 29, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.